package com.smart.common.utils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import java.util.*;
import java.util.stream.Collectors;

import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * 时间工具类
 *
 * @author smart
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate() {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts) {
        try {
            return new SimpleDateFormat(format).parse(ts);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 获取年月日日期
     */
    public static Date getNowDate(String format){
        return DateUtils.parseDate(DateUtils.parseDateToStr(format, getNowDate()));
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str.toString(), parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算相差天数
     */
    public static int differentDaysByMillisecond(Date date1, Date date2) {
        return Math.abs((int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24)));
    }


    /**
     * 获取两个时间中间所有日期
     * @param startDate
     * @param endDate
     * @return
     */
    public static List<LocalDate> getAllDaysForBothTimes(LocalDate startDate, LocalDate endDate)

    {
        List<LocalDate> allDates = new ArrayList<>();
        LocalDate currentDate = startDate;
        while (currentDate.isBefore(endDate) || currentDate.isEqual(endDate)) {
            allDates.add(currentDate);
            currentDate = currentDate.plusDays(1);
        }
        return allDates;
    }

    /**
     * 计算时间差
     *
     * @param endDate   最后时间
     * @param startTime 开始时间
     * @return 时间差（天/小时/分钟）
     */
    public static String timeDistance(Date endDate, Date startTime) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - startTime.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 增加 LocalDateTime ==> Date
     */
    public static Date toDate(LocalDateTime temporalAccessor) {
        ZonedDateTime zdt = temporalAccessor.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 增加 LocalDate ==> Date
     */
    public static Date toDate(LocalDate temporalAccessor) {
        LocalDateTime localDateTime = LocalDateTime.of(temporalAccessor, LocalTime.of(0, 0, 0));
        ZonedDateTime zdt = localDateTime.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 增加 Date ==> LocalDateTime
     */
    public static LocalDate toLocalDate(Date date) {
        return date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
    }
    /**
     * 增加 Date ==> LocalDateTime
     */
    public static Date toLocalDateTime(LocalDateTime localDateTime) {
        return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
    }

    /**
     * 增加 DateList ==> LocalDateList
     */
    public static List<LocalDate> toLocalDateList(List<Date> dateList) {
        return dateList.stream().map(date -> date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate()).collect(Collectors.toList());
    }
    /**
     * 增加 LocalDateTimeList ==> DateList
     */
    public static List<Date> toDateList(List<LocalDateTime> list) {
        return list.stream().map(localDateTime -> Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant())).collect(Collectors.toList());
    }
    /**
     * 增加 LocalDateList ==> DateList
     */
    public static List<Date> toDateList1(List<LocalDate> list) {
        return list.stream().map(localDate -> Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant())).collect(Collectors.toList());
    }

    /**
     * 字符串时间转换为地址栏URL传参格式
     * @param dateStr
     * @return
     */
    public static String parseStrToUrlStrDate(String dateStr,String append) {
        if(dateStr.contains(":")){
            dateStr = dateStr.replaceAll("\\+"," ");
        }else{
            return dateStr+"+"+append;
        }
        return dateStr;
    }

    /**
     * 日期拼接时间
     */
    public static String parseDateToStr(String format, Date date,String str) {
        if (date == null) {
            return null;
        }
        return new SimpleDateFormat(format+str).format(date);
    }
    /**
     * 获取日期指定拼接时间
     */
    public static Date getAppendTime(Date date,String str) {
        String s = parseDateToStr("yyyy-MM-dd",date," "+str);
        return parseDate(s);
    }

    /**
     * 获取今日零点零分零秒
     */
    public static Date getStartTime()
    {
        return getAppendTime(getNowDate(),"00:00:00");
    }

    /**
     * 获取今日二十三点五十九分五十九秒
     */
    public static Date getEndTime()
    {
        return getAppendTime(getNowDate(),"23:59:59");
    }

    /**
     * 获取当前日期-5天的日期格式为yyyy-MM-dd
     */
    public static Date getDateBefore(Date date, int day) {
        Calendar now = Calendar.getInstance();
        now.setTime(date);
        now.set(Calendar.DATE, now.get(Calendar.DATE) - day);
        // 清零时分秒
        now.set(Calendar.HOUR_OF_DAY, 0);
        now.set(Calendar.MINUTE, 0);
        now.set(Calendar.SECOND, 0);
        now.set(Calendar.MILLISECOND, 0);
        return now.getTime();
    }

    /**
     * 获取当前月份的第一天
     * @return 当前月份的第一天的Date对象
     */
    public static Date getFirstDayOfMonth() {
        LocalDate firstDayOfMonth = YearMonth.now().atDay(1);
        return Date.from(firstDayOfMonth.atStartOfDay(ZoneId.systemDefault()).toInstant());
    }

    /**
     * 获取当前月份的最后一天
     * @return 当前月份的最后一天的Date对象
     */
    public static Date getLastDayOfMonth() {
        LocalDate lastDayOfMonth = YearMonth.now().atEndOfMonth();
        return Date.from(lastDayOfMonth.atStartOfDay(ZoneId.systemDefault()).toInstant());
    }
    public static void main(String[] args) {
        //获取当前年月日,只获取当前日第一天
        System.err.println(parseDateToStr(YYYY_MM_DD, getFirstDayOfMonth()));

    }

    public static Date getFirstDayOfLastMonth() {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.MONTH, -1);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        return calendar.getTime();
    }

    public static Date getLastDayOfLastMonth() {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.MONTH, -1);
        calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        calendar.set(Calendar.MILLISECOND, 999);
        return calendar.getTime();
    }
}
